BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1994-09-01'
	and o_orderdate < cast(date '1994-09-01' + interval '3 month' as date)
	and exists (
		select
			*
		from
			lineitem
		where
			l_orderkey = o_orderkey
			and l_commitdate < l_receiptdate
	)
group by
	o_orderpriority
order by
	o_orderpriority;
                                                                                         QUERY PLAN                                                                                          
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=1299978.75..1299978.75 rows=1 width=16) (actual time=100088.498..100088.498 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=968955 read=555888 written=1193
   ->  HashAggregate  (cost=1299978.73..1299978.74 rows=1 width=16) (actual time=100088.307..100088.310 rows=5 loops=1)
         Buffers: shared hit=968950 read=555888 written=1193
         ->  Hash Join  (cost=1028585.14..1299205.98 rows=154549 width=16) (actual time=86291.695..99730.050 rows=520923 loops=1)
               Hash Cond: (orders.o_orderkey = lineitem.l_orderkey)
               Buffers: shared hit=968950 read=555888 written=1193
               ->  Bitmap Heap Scan on orders  (cost=12617.21..277639.16 rows=580997 width=20) (actual time=664.978..3370.143 rows=568317 loops=1)
                     Recheck Cond: ((o_orderdate >= '1994-09-01'::date) AND (o_orderdate < '1994-12-01'::date))
                     Buffers: shared hit=227114 read=5048 written=17
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..12471.96 rows=580997 width=0) (actual time=492.330..492.330 rows=574585 loops=1)
                           Index Cond: ((o_orderdate >= '1994-09-01'::date) AND (o_orderdate < '1994-12-01'::date))
                           Buffers: shared read=1646
               ->  Hash  (cost=999143.08..999143.08 rows=1345988 width=4) (actual time=85624.139..85624.139 rows=13767238 loops=1)
                     Buckets: 262144  Batches: 1  Memory Usage: 484005kB
                     Buffers: shared hit=741836 read=550840 written=1176
                     ->  HashAggregate  (cost=985683.20..999143.08 rows=1345988 width=4) (actual time=70900.910..80384.636 rows=13767238 loops=1)
                           Buffers: shared hit=741836 read=550840 written=1176
                           ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.00..935095.74 rows=20234985 width=4) (actual time=0.183..36322.305 rows=37966174 loops=1)
                                 Buffers: shared hit=741836 read=550840 written=1176
 Total runtime: 100422.608 ms
(23 rows)

COMMIT;
COMMIT